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Extreme ReactorsMinecraft mod for 1.21.1

Extreme Reactors is the original port of the 1.7.10 mod Big Reactors, by Erogenous Beef, rewritten for MC 1.9.4 / 1.10.x / 1.11 / 1.12.2 and 1.16.3 / 1.16.4 / 1.16.5 / 1.17.1 / 1.18.1 / 1.18.2 / 1.19 / 1.19.1 / 1.19.2 / 1.20 / 1.20.1 / 1.21 / 1.21.1

client and servernewest supported 1.21.1TechnologyWorldgen
Latest version
1.21.1-2.4.9
Minecraft
1.9.4 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
MIT
Downloads
316.9k
Updated
2 y ago
Available on
Modrinth
Space NodeOur hosting

Host Extreme Reactors servers

One click and Extreme Reactors is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Extreme Reactors declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21NeoForge, Forge21+declared13 Jun 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.20NeoForge, Forge17+declared2 Jun 2023
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.18.2Forge, NeoForge17+declared28 Feb 2022
1.17.1NeoForge, Forge16+declared6 Jul 2021
1.16.5Forge, NeoForge8+declared14 Jan 2021
1.12.2Forge, NeoForge8+declared18 Sept 2017
1.11.2NeoForge, Forge8+declared21 Dec 2016
1.10.2NeoForge, Forge8+declared23 Jun 2016
1.9.4Forge, NeoForge8+declared10 May 2016

Download

From Extreme Reactors’s own host. Nothing is re-hosted here.

All 38 releases
1.21.1-2.4.9release18 Sept 2024

ExtremeReactors2-1.21.1-2.4.9.jar · 2.4 MB · for 1.21.1

Download latest
4b934d447975…
Older versions24
  • 1.21-2.4.515 Aug 20241.21, 1.21.12.4 MB1.1k downloads6a2b2f1a4646…Get
  • 1.20.1-2.0.8415 Aug 20241.20.12.4 MB38.8k downloads90bc23690603…Get
  • 1.21-2.4.431 Jul 20241.21, 1.21.12.4 MB1.4k downloads7d9349103a4d…Get
  • 1.20.1-2.0.8331 Jul 20241.20.12.4 MB1.4k downloadsd9fda53ee92d…Get
  • 1.20.1-2.0.7515 Oct 20231.20.12.2 MB30.4k downloads6692cae13b74…Get
  • 1.20.1-2.0.749 Oct 20231.20.12.2 MB877 downloads1eea2df4443d…Get
  • 1.20.1-2.0.731 Oct 20231.20.12.2 MB755 downloads7f425d2fe268…Get
  • 1.20.1-2.0.7125 Aug 20231.20.12.2 MB1.5k downloadsdec2b32ebf3c…Get
  • 1.19.2-2.0.7125 Aug 20231.19.22.2 MB94.9k downloadsdead9541fed0…Get
  • 1.18.2-2.0.7125 Aug 20231.18.22.2 MB5.4k downloads9a1f604f691a…Get
  • 1.16.5-2.0.7125 Aug 20231.16.52.2 MB11.3k downloads66313afc6a7c…Get
  • 1.20.1-2.0.7013 Aug 20231.20.12.2 MB1.0k downloadsc84fb5338f6d…Get
  • 1.19.2-2.0.7013 Aug 20231.19.22.2 MB1.6k downloads757491d50cf7…Get
  • 1.18.2-2.0.7013 Aug 20231.18.22.2 MB179 downloads212bde605ddb…Get
  • 1.16.5-2.0.7013 Aug 20231.16.52.2 MB178 downloads86a405e7b800…Get
  • 1.20.1-2.0.6923 Jul 20231.20.12.2 MB1.3k downloads1baccd30b4a0…Get
  • 1.20.1-2.0.6822 Jul 20231.20.12.2 MB199 downloadsecb6028165e2…Get
  • 1.20.1-2.0.6716 Jul 20231.20.12.2 MB363 downloads5d2a17a2c336…Get
  • 1.20-2.0.6617 Jun 20231.20, 1.20.12.2 MB526 downloads58ab58521900…Get
  • 1.19.2-2.0.648 Jun 20231.19.22.3 MB2.4k downloads447d0a46b273…Get
  • 1.18.2-2.0.648 Jun 20231.18.22.2 MB695 downloads8dd0d0d90a67…Get
  • 1.16.5-2.0.648 Jun 20231.16.52.2 MB1.2k downloads8d2fd20b6125…Get
  • 1.19.2-2.0.622 Mar 20231.19.22.2 MB6.5k downloads84d47a9ce50c…Get
  • 1.18.2-2.0.6126 Feb 20231.18.22.2 MB867 downloads223c7b66f3db…Get

Frequently asked

Does Extreme Reactors work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Extreme Reactors declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Extreme Reactors support?

Everything the author has declared, from 1.9.4 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Extreme Reactors on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Extreme Reactors support?

NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Extreme Reactors?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Extreme Reactors under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Extreme Reactors?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Extreme Reactors safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

BookshelfAn open source library for other mods!GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)

Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .